/Engine/Source/Runtime/MovieScene/Public/MovieSceneSection.h
A true representation of this section's range with an inclusive start frame and an exclusive end frame. The resulting range defines that the section lies between { lower <= time < upper }
[TRange](API\Runtime\Core\Math\TRange)< [FFrameNumber](API\Runtime\Core\Misc\FFrameNumber) > GetTrueRange() const